Podtrac measurement can be used when hosting your podcast on Squarespace. You can read the Squarespace help article here:
Here are the steps to follow:
Create a blog for your podcast on Squarespace
Add a blog post for each new episode that has an audio block with the audio file in that block as content
Each time you post an episode, in the Podcasting tab, scroll to the bottom
Enter the Podtrac prefix in the Podcast Analytics URL field. Here is the Podtrac Prefix: https://dts.podtrac.com/redirect.mp3/